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entified in this review may help mitigate the harmful impact of PTSD and promote nurse well-being. © 2020 John Wiley Sons Ltd.The direct Friedel-Crafts-type coupling and dedinitrogenation reactions of vinyldiazo compounds with aromatic compounds using a metal-free strategy are described. This acid-catalyzed methodology is efficient for the formation of α-diazo-β-carbocations (vinyldiazonium ions), vinyl carbocations, and allylic or homoallylic carbocation species via vinyldiazo compounds. By choosing suitable nucleophilic reagents